Reference clocks.

[Gary E. Miller]

Yo Hal!

On Tue, 03 May 2016 14:29:58 -0700
Hal Murray <hmurray at megapathdsl.net> wrote:

> gem at rellim.com said:
> > Please, no GPS-18s.  The Garmin Binary protocol is a mess and the
> > chip is over 10 years old with a weak sensitivity, no GLONASS,
> > etc.  Many better GPS LVC solutions.   
> 
> The GPS-18x is only 5 years old.  1/2 :)

The manual was released in 2007, the last manual revision was in 2011, so
no longer really suppoerted.   Check your date math.

> It speaks NMEA so you don't have to mess with the binary stuff.

Unless you want the good data that is only in the binary.

Also, no Glonass, BeiDu, EGNOS, etc.
 
> The USB versions don't speak NMEA.  I assume they ran out of ROM or
> such. But they don't have a PPS so they aren't very interesting so I
> don't care if I can talk to them.

Yeah, not interesting at all.

> Do you have suggestions for better "LVC" gear?

GR-801T:

http://www.navisys.com.tw/products/GPS&GNSS_%20receivers/flyer/GR-801_flyer-150703.pdf

Or the GR-801R has real RS-232 levels.

$35 - http://www.idealez.com/navisys/product-detail/en_US/114971

> One unit I forgot to mention on my previous message is the Sure demo
> board. It has both USB and serial connections.  Power from USB.  No
> PPS, but you can wire it up.  Some of the pins are tiny so that
> wiring requires some skill.

USB 1.1 or 2.0?

> http://www.ebay.com/itm/SKG16A-Bluetooth-RS232-USB-UART-GPS-Module-Demo-Board-
> /230844194302
> 
> Lots of info here:
>   http://www.satsignal.eu/ntp/Sure-GPS.htm

Cool.

RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
	gem at rellim.com  Tel:+1 541 382 8588
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